Re: OSPF virtual link

Marcin,

You don't need a direct physical connection for two routers to form a
virtual-link. What happens if R1's interface to area 0 goes down or goes
away? You still have a partitioned area 0 if you don't have a VL between R2
and R3.

On Thu, Nov 5, 2009 at 7:35 AM, Marcin Zgola <MZgola_at_netrixllc.com> wrote:

> area0
> |
> |
> R3----------
> \
> \
> Area 134 \R1---area0
> Frame Relay /
> /
> /
> R2----------
> |
> |
> Area0
>
> Ok, so my question is: do i need to have virtual links between r3-r1,
> r1-r2, and r3-r2 or between r3-r1 and r1-r2 is good enough. Since r2 and r3
> do not have physical connection.
>
>
> I hope this make sense guys
> .
>
> Marcin Zgola
> Internetwork Lead
> CCIE #18676
> Netrix, LLC
> http://www.netrixllc.com
> Ph. 847-964-5300
> Fax.: 847-964-5350
>
> -----Original Message-----
> From: tharak.abraham_at_wipro.com [mailto:tharak.abraham_at_wipro.com]
> Sent: Wednesday, November 04, 2009 11:06 PM
> To: Marcin Zgola; ccielab_at_groupstudy.com
> Subject: RE: OSPF virtual link
>
> Marcin,
>
> If possible could you make your scenario a lil more clearer ?
>
> If I got it right with the hub having an attached area 0, then the
> topology looks fine without any VL's.
>
> Please post your observation ..
>
> BR,
> Tharak.
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Marcin Zgola
> Sent: Thursday, November 05, 2009 8:09 AM
> To: ccielab_at_groupstudy.com
> Subject: OSPF virtual link
>
> Internetwork expert workbook 5 volume II Lab 11.
>
>
>
> If I have a network diag 2 spokes connected to a hub using frame relay
> (no pvc between spokes)
>
>
>
> In this could I run OSPF Are 134, and each of my frame relay routers
> also connects to Area 0 mean that I need virtual link to complete Area
> 0.
>
>
>
> My question is should I have VL between spokes and hub? Or also between
> spokes as well?
>
>
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